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A kind of polyurethane moisture curing hot melt adhesive for edge sealing

A hot-melt adhesive, moisture-curing technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of edge sealing material peeling, environmental pollution, poor chemical corrosion resistance and aging resistance and other problems, to achieve the effect of large curing force, good thermal conductivity and fast curing speed

Active Publication Date: 2020-06-16
广州市永隆新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When traditional hot-melt adhesives are sealed and then hot-pressed for veneering, the adhesive layer is not resistant to the high temperature of hot-pressing, causing the edge-banding material to fall off.
Temperature resistance, chemical corrosion resistance and aging resistance are poor, and adhesives such as white latex and solvent glue have free formaldehyde and chemical solvents to pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A highly adaptable polyurethane hot melt adhesive for edge banding, prepared from the following raw materials in parts by mass: 10 parts of polyester polyol 7360, 10 parts of polyester polyol 7380, 15 parts of polyester polyol 7150, 20 parts Parts EA28400, 18 parts polyester polyol L-3017, 10 parts polyester polyol H3022, 8 parts copolyester resin S1402, 9 parts MDI-100.

[0016] The preparation method of polyurethane hot-melt adhesive for edge sealing comprises the steps:

[0017] Weigh the above raw materials according to the above mass ratio, first add polyester polyol and copolyester resin into the reaction kettle, heat up to 100°C under the pressure of 0.08MPa to melt, dehydrate until the liquid material has no bubbles escape, and then cool down to 80°C ℃, then add MDI-100 and raise the temperature to 120 ℃ for 1.5h of polymerization reaction, until the molar percentage of residual isocyanate reaches 1%, then filter and discharge while it is hot.

Embodiment 2

[0019] A highly adaptable polyurethane hot melt adhesive for edge banding, prepared from the following raw materials in parts by mass: 10 parts polyester polyol 7360, 10 parts polyester polyol 7380, 12 parts polyester polyol 7150, 18 parts Parts EA28400, 20 parts polyester polyol L-3017, 13 parts polyester polyol H3022, 8 parts copolyester resin S1402, 9 parts MDI-100.

[0020] The preparation method of polyurethane hot-melt adhesive for edge sealing comprises the steps:

[0021] Weigh the above raw materials according to the above mass ratio, first add polyester polyol and copolyester resin into the reaction kettle, heat up to 90°C under the pressure of 0.085MPa to melt, dehydrate until the liquid material has no bubbles, and cool down to 85°C ℃, then add MDI-100 and raise the temperature to 115 ℃ for polymerization reaction for 1.5h until the molar percentage of residual isocyanate reaches 1.5%, then filter and discharge while it is hot.

Embodiment 3

[0023] A highly adaptable polyurethane hot melt adhesive for edge banding, prepared from the following raw materials in parts by mass: 9 parts polyester polyol 7360, 9 parts polyester polyol 7380, 15 parts polyester polyol 7150, 15 parts Parts EA28400, 20 parts polyester polyol L-3017, 15 parts polyester polyol H3022, 8 parts copolyester resin S1402, 9 parts MDI-100.

[0024] The preparation method of polyurethane hot-melt adhesive for edge sealing comprises the steps:

[0025] Weigh the above raw materials according to the above mass ratio, first add polyester polyol and copolyester resin into the reaction kettle, heat up to 120°C under the pressure of 0.09MPa to melt, dehydrate until the liquid material has no bubbles, and then cool down to 95 ℃, then add MDI-100 and raise the temperature to 120 ℃ for 1.5h of polymerization reaction until the molar percentage of residual isocyanate reaches 0.5%, then filter and discharge while it is hot.

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PUM

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Abstract

The invention relates to a polyurethane moisture curing hot melt adhesive for edge sealing, which is prepared from the following raw materials: polyester polyol 7360, 5-polyester polyol 7380, polyester polyol 7150, 1 EA28400, polyester polyol L-3017, polyester polyol H3022, copolyester resin S1402, and MDI-100. The polyurethane moisture curing hot melt adhesive for the edge sealing is prepared byweighing the raw materials, adding polyester polyol and the copolyester polyester resin into a reaction kettle, performing heating-up, melting and dehydration till no bubbles escape from a liquid material, adding MDI-100, heating up to 110-120 DEG C for a polymerization reaction for 1.5h till a mole percentage of residual isocyanic acid radicals reaches 0.5-2%, and performing filtration and discharging when a product is hot. The prepared high-adaptability polyurethane hot melt adhesive for the edge sealing has excellent bonding strength, temperature tolerance, chemical resistance and aging resistance.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a polyurethane moisture-curing hot-melt adhesive for edge sealing, in particular to a highly adaptable polyurethane moisture-curing hot-melt adhesive for edge sealing. Background technique [0002] In order to make full use of wood resources, the furniture and building materials industries are increasingly using recycled products from the leftover scraps of wood processing: laminated boards, density boards, particle boards, etc. The corners of furniture and decorative components made of these boards used to be white latex, all-purpose glue or EVA hot-melt glue. However, these adhesives contain more or less free formaldehyde or organic solvents that damage the atmospheric environment, and their curing is achieved by chemical reactions or volatile solvents. Therefore, it takes a certain amount of time from sizing to the relative positioning of the adhered parts. The work efficie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/06C08G18/42
CPCC08G18/4202C09J175/06
Inventor 李治伟何显汉王尚文朱金水
Owner 广州市永隆新材料研究院有限公司
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